The ORB of 401 Sqn is online but I have not the time to check it.
Google found some pages with data on your guy:
http://www.crash-aerien.news/forum/l...28936-630.html (with a picture and a date of death in 1955).
https://fr.findagrave.com/memorial/5...vid-wayne-howe (with the same day and month of death but in 1995). See attached documents and you will see official papers showing that he served in USAAF from 3 June 1943 to 4 August 1945 (
https://fr.findagrave.com/memorial/5...hoto=270197496), and that he was a member of RCAF before joining USAAF (
https://fr.findagrave.com/memorial/5...hoto=270197426, his date of foregin service is listed from 7 Dec 1941 to 4 May 1945, but he probably joinded RCAF before 7 Dec 1941)
https://americanarchive.iwm.org.uk/a...david-w-howe-0 (he earned his wings of pilot in RCAF on 8 October 1942, confirmed death date in 1995)
https://www.facebook.com/groups/2536...1862008399858/ (enlisted in RCAF 22 Sep 1941, earned wings 2 Oct 1942)